The FBI opened up a cold case in hopes that investigative techniques used in the west mesa investigation will turn over new information.

In 1999, two boys found a female skeleton on Navajo land near Gallup.

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This week, investigators went back to the site where the skeleton was found 10 years ago.

"They did find some additional evidence, find some additional bones, that we believed belonged to the victim," said Darren Jones with the FBI.

Investigators used digging techniques used by Albuquerque police officers during the investigation on the west mesa where 11 women were found buried.

"We know she received blunt forced trauma to the chest, which begs the question was this a car accident perhaps. Was it an accident or an intentional injury," said Jones.

A year ago, an artist put together a sketch of what they think this woman might have looked like. They say she was Caucasian, between 35 and 50 years old. But right now they have no idea who she is, how she got there or if foul play was involved.